105402521021 has 8 divisors (see below), whose sum is σ = 121813508160. Its totient is φ = 89329904928.

The previous prime is 105402520999. The next prime is 105402521047. The reversal of 105402521021 is 120125204501.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 105402521021 - 2³⁴ = 88222651837 is a prime.

It is a super-2 number, since 2×105402521021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105402521221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84592091 + ... + 84593336.

It is an arithmetic number, because the mean of its divisors is an integer number (15226688520).

Almost surely, 2^105402521021 is an apocalyptic number.

It is an amenable number.

105402521021 is a deficient number, since it is larger than the sum of its proper divisors (16410987139).

105402521021 is an equidigital number, since it uses as much as digits as its factorization.

105402521021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169185523.

The product of its (nonzero) digits is 800, while the sum is 23.

Adding to 105402521021 its reverse (120125204501), we get a palindrome (225527725522).

The spelling of 105402521021 in words is "one hundred five billion, four hundred two million, five hundred twenty-one thousand, twenty-one".